rground city," predicted Tom. "Come on, Ned, we'll take in a
moving picture show, have our last lunch in the big city, and then
go aboard."

So impatient were the travelers to go on board the steamer that they
arrived several hours before the time set for sailing. Many others
did the same thing, however, as supper was to be served on the
Maderia.

Though it was within a few hours of leaving time there seemed so
much to be done, such a lot of cargo to stow away, and so much coal
to put into the bunkers, that Tom and the others might well be
excused for worrying about whether or not they really would sail.

Big trucks drawn by powerful horses thundered down the long dock.
Immense automobiles laden with boxes, barrels and bales puffed to
the loading gangways. There was the puffing and whistling of the
donkey engines as they hoisted into the big holds the goods intended
for export.

At the side of the steamer were grimy coal barges, into which was
dipped an endless chain of buckets carrying the coal to the bunkers.
Stevadores were running here and there, orders and counter-orders
were being given, and the confusion must have been maddening to any
one not accustomed to it.

"Bless my walking stick!" exclaimed Mr. Damon. "We'll never get off
to-night, I'm positive."

"Dat's right," agreed Eradicate. "Look at all dat coal dey's got to
load in."

"Oh. they knew how to hustle at the last minute," said Tom, and so
it proved. Gradually the loading was finished. The coal barges were
emptied and towed away. Truck after truck departed from the dock
empty, having left its load in the interior of the steamer. One
donkey engine after another ceased to puff, and the littered decks
were cleared.

"Let's watch the late-comers get aboard," suggested Ned to Tom, when
they had arranged things in their stateroom. The two boys and Mr.
Damon had a large one to themselves and Eradicate had been assigned
a small one not far from them.

"That'll make the time pass until supper is ready," agreed the young
inventor, so they took their station near the main gangway and
watched the passengers hurrying up. There were many going to make
the trip to Mexico it seemed, and later the boys learned that a
tourist agency had engaged passage for a number of its patrons.

"That fat man will never get up the slope unless some one pushes
him," remarked Ned, pointing to a very fleshy individual who was
struggling up the steep gangplank, carrying a hea